Dome for tanks and method of making the same



Nov. 15, 1927. 1,648,919

R. M. SMITH DOME FOR TANKS .AND METHOD OF MAKING THE SAME Fiied Sept.12, 1923 2 Sheets-Sheet l $7 INVENTOR' BY r 4 'ATTORNEYS.

Nov. 15, 1927.

IN V EN TOR.

VL%NEYS.

Patented Nov. 15, 1927.

UNITED STATES PATENT OFFICE,

RAY MOSHER SMITH, or new YORK, n. Y., ASSIGNOR r0 UNION TANK canCOMPANY,

OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

DOME FOR TANKS AND METHOD OF LMAKING THE SAME.

Application filed September 12, 1923. Serial No. 662,163.

My invention consists of certain novel parts and combinations ofpartsparticularly pointed out in the claims. The following is adescription of an apparatus for carrying out my invention in the form atpresent preferred by me, but it will be understood that variousmodifications and changes may be made without departing from the spiritof my invention and without exceeding the scope of my claims.

My invention will best be understood by reference to the accompanyingdrawings illustrating one emobdiment of my invention in which Figure 1is a perspective view, partially in section, illustrating a dome for atank made in accordance with my invention; Fig. 2 is a verticaltransverse section taken through the tank and dome therefor; and Fig. 3is a vertical longitudinal section.

Like reiference characters indicate like parts throughout the drawings.

Referring now to the drawings, 10 is a tank here shown as circular inform and of the type commonly mounted on vehicles and used fortransporting or storing liquids. In the form shown the cylindricalportion of the tank is made of three sheets, a bottom sheet 10 and twocrown sheets 10 and 10, the sheets being riveted together as at 11, inthe usual manner. IVhile I have illustrated my invention in connectionwith a tank made from three sheets, it will be understood that the samemay be made from four or any other number of sheets. lVhe-n made fromfour sheets, or any other number or otherwise formed from the single topsheet.

In accordancewith my invention, the dome for the tank indicatedgenerally at 12 and through which liquids are charged into the tank andaccess generally obtained thereto, is partially formed by an annularflange 13 which is integral with the metal sheet of which the tank isformed. This annular flange, which is usually cylindrical inform, ismade by either pressing or flangmg or otherwise upsetting the metal ofthe sheet of which the tank is formed, and when there are two crownsheets, as illustrated, part of the flange 13 is formed from one of thecrown sheets 10 while the other part is formed from the crown sheet 10,the two parts being riveted together as at 14. A separately formed domemember 15 which is preferably formed by a pressing operation, is made totelescope with the flange 13, and is secured.

thereto as at 16 by riveting. The dome member 15 is preferably formedwith an annular portion 151 which is secured to the flange 13 and aninwardly extending portion 152v which serves as a cover and is shown asprovided with the usual manhole 153. The

annular circular flange which is integral invention, eliminates any domeflange sea a,

increasing the efficiency of the tank as there are less chances forleakage. Furthermore my invention reduces the large number of rivetsused in riveting the dome to the tank and thus increases the efficiencyof the tank as there are less chances for leakage. In addition, theoperations involved in making a dome in accordance with my invention,may be carried out with machinery instead of by hand as has heretoforebeen necessary.

I claim:

1. In combination, a substantially cylindrical tank and a dome thereforformed in part by a substantially cylindrical flange integral with thetank sheet and extending laterally from the cylindrical portion of thetank and in part by a separate dome member secured thereto, thelongitudinal axis of the dome being arranged at an angle to the axis ofthe tank.

2. In combination, a substantially cylindrical tank and a dome thereforformed in part by a substantially cylindrical flange integral with thetank sheet and extending laterally from the cylindrical portion of thetank and in part by a separate dome member having a cylindricalattaching portion by which it may be secured to said flange, thelongitudinal axis of the dome being arranged at an angle to the axis ofthe tank.

ill

3. In combination, a substantially cylindriby a substantiallycylindrical flange integral with the tank sheet and extending laterallyfrom the upper cylindrical portion of said tank, and in part by aseparate dome member secured to said flange, said dome member having anannular attaching portion and an inwardly extending portion forming acover for the dome, the longitudinal axis of the dome being arrangedatan angle to the axis of the tank.

4. In combination, a substantially cylindrical tank and a dome thereforcomprising acylindrical flange formed integral with the crown sheet ofsaid tank and extending from a side thereof at an angle thereto andintermediate the ends ofthe tank, and a separate dome member secured tosaid flange, said dome member having an annular attaching portion and aninwardly extending portion forming a cover for the dome, thelongitudinal axis of the dome beingarranged at an angle to the axis ofthe tank.

RAY MOSHER SMITH. I

